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作者:Valérie Chavagnac , Hassan Saleban Ali ...
来源:[J].Chemical Geology(IF 3.154), 2018, Vol.499
摘要:Abstract(#br)While hydrothermal vents are now thought to be a major source of dissolved iron to the oceans, they have always been considered to be a sink for the dissolved rare-earth elements (DREEs). However, true dissolved REE observations in hydrothermal plumes are still ...
作者:Valérie Chavagnac , Karine Desboeufs ...
来源:[J].Scientific Reports(IF 2.927), 2018, Vol.8 (1), pp.1-9
摘要:Abstract In the Western Tropical South Pacific, patches of high chlorophyll concentrations linked to the occurrence of N2-fixing organisms are found in the vicinity of volcanic islands. The survival of these organisms relies on a high bioavailable iron supply whose origin an...
作者:Valérie Chavagnac , Yujin Choi ...
来源:[J].Earth and Planetary Science Letters(IF 4.349), 2016, Vol.450, pp.96-107
摘要:Abstract(#br)Properly assessing the extent and magnitude of fault ruptures associated with large earthquakes is critical for understanding fault behavior and associated hazard. Submarine faults can trigger tsunamis, whose characteristics are defined by the geometry of seaflo...
作者:Valérie Chavagnac , Christopher R. German ...
来源:[J].Chemical Geology(IF 3.154), 2004, Vol.216 (3), pp.329-352
摘要:Abstract(#br)A geochemical investigation was carried out on two sediment cores collected at 2 and 5 km from the Rainbow hydrothermal vent site. Bulk sediment compositions indicate that these cores record clear enrichments in Fe, Cu, Mn, V, P and As from hydrothermal plume fa...
作者:Valérie Chavagnac
来源:[J].LITHOS(IF 3.779), 2004, Vol.75 (3), pp.253-281
摘要:Abstract(#br)The Komati Formation of the Barberton greenstone belt (BGB), South Africa, is composed of both Al-undepleted and -depleted komatiites. The Al-undepleted komatiites are characterised by Al 2 O 3 /TiO 2 and CaO/Al 2 O 3 ratios of 15–18 and 1.1–1.5, respectively, a...
作者:Valérie Chavagnac , Mathieu Lair ...
来源:[J].Marine Geology(IF 2.732), 2007, Vol.247 (3), pp.208-225
摘要:Abstract(#br)A geochemical and Sr isotope study was carried out on sediment cores collected from the Logatchev hydrothermal vent site (14°45′N) on the Mid-Atlantic ridge, with the aim of identifying aeolian inputs into the overlying water column. The Logatchev vent site lies...
作者:Valérie Chavagnac , Jan D Kramers ...
来源:[J].Precambrian Research(IF 4.441), 2001, Vol.112 (1), pp.51-86
摘要:Abstract(#br)We have carried out major and trace element analyses and Nd–Pb isotope measurements on different components of two migmatite outcrops in the Limpopo Belt (Lose Quarry, Botswana, and Palala, South Africa) in order to assess the effect of migmatization during a hi...
作者:Valérie Chavagnac , Thomas F. Nägler , Jan D. Kramers
来源:[J].LITHOS(IF 3.779), 1999, Vol.46 (2), pp.275-298
摘要:Abstract(#br)We have carried out major and trace element analyses as well as Nd and Pb isotope measurements on a stromatic migmatite in the Phikwe Complex (Botswana) in order to assess the effect of high-grade metamorphic event leading to migmatization on apparent Nd model a...
作者:... Gilles Berger , Valérie Chavagnac , Philippe Besson
来源:[J].Palaeogeography, Palaeoclimatology, Palaeoecology(IF 2.745), 2013, Vol.392, pp.524-533
摘要:Abstract(#br)An experimental study was carried out to assess the abiotic natural reactions associated with carbonate precipitation leading to the formation of Neoproterozoic cap carbonate sequences. For this purpose, synthetic seawater solutions were prepared reflecting the ...
作者:... Cédric Boulart , Alain Castillo , Valérie Chavagnac
来源:[J].Sensors & Actuators: B. Chemical(IF 3.535), 2012, Vol.170, pp.176-181
摘要:Abstract(#br)The use of electrodeposited PdNi–Si Schottky barriers as low power Hydrogen sensors is investigated. The Palladium content of the film causes the Hydrogen molecules to dissociate and be absorbed by the film, changing the metal work function and Schottky barrier ...

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